GE Security Interlogix Simon 3 Simon XT Wireless Freeze Sensor Freeze sensor guards against wide-ranging damage owing to undetected freezing Works perfectly with a Simon XT or Simon XTi home security system with LiveWatch alarm monitoring Can be added to a wireless home security system with video surveillance cameras and more Easy to install with Plug & Protect from SafeMart. Wireless devices from SafeMart are easy to install, relocate and use with LiveWatch alarm monitoring. The service that comes with LiveWatch alarm monitoring makes the camera superior to anything you can purchase from Home Security Store, SimpliSafe or any other home security dealer.